Pinned Messages (#2081)

* add pinned room events hook

* room pinned message - WIP

* add room event hook

* fetch pinned messages before displaying

* use react-query in room event hook

* disable staleTime and gc to 1 hour in room event hook

* use room event hook in reply component

* render pinned messages

* add option to pin/unpin messages

* remove message base from message placeholders and add variant

* display message placeholder while loading pinned messages

* render pinned event error

* show no pinned message placeholder

* fix message placeholder flickering

src/app/features/room/room-pin-menu/RoomPinMenu.css.ts

@@ -0,0 +1,18 @@
+import { style } from '@vanilla-extract/css';
+import { config, toRem } from 'folds';
+
+export const PinMenu = style({
+  display: 'flex',
+  maxWidth: toRem(548),
+  width: '100vw',
+  maxHeight: '90vh',
+});
+
+export const PinMenuHeader = style({
+  paddingLeft: config.space.S400,
+  paddingRight: config.space.S200,
+});
+
+export const PinMenuContent = style({
+  paddingLeft: config.space.S200,
+});